Very nice, I enjoyed it. Nice use of several elements (textures, lighting) to emphasize the different atmospheres (dismal, heavenly).

It reminds me a little of Pixar's "Monsters, Inc.", in particular the "door factory" or whatever they called it. (An aside, one of the outtakes using that particular scene is one of the funniest videos I've ever seen, where they lose control of the door shredder).